City of Raleigh’s Pollution Remediation, Heat Island Reduction, and Pavement Preservation with TiO2 Enhanced Pavements

TiO2 Enhanced Pavements

The City of Raleigh worked with Pavement Technology, Inc. (PTI), to reduce greenhouse gas emissions, mitigate urban heat islands, and address water pollutant issues through an innovative approach that involves adding Titanium Dioxide to the asphalt rejuvenation process to create “Cool Pavement.” At the completion of the pilot project, treated roads showed a 37% reduction in Nitrogen Oxides, which are a type of roadway contaminant, and an average Solar Reflective Index (SRI) of 38.2-a nearly 400% improvement over the untreated locations. These results fostered a relationship between the City and the Global Cool Cities Alliance – Cool Roadways Program, which has created more pilot projects in different municipalities throughout the country.